In short: Ipo work: an initial public offering is when a company first sells shares to the public. Here is how it works and what to watch.
An IPO, or initial public offering, is the first time a private company sells its shares to the public on a stock exchange.

Why companies do it
It can raise large amounts of money for growth, give early investors and employees a way to sell, and raise a company’s profile.
How it works
The company hires investment banks called underwriters. They help set the price, prepare a document called a prospectus filed with the SEC, and sell shares to large investors first. After that, the shares begin trading on the exchange.
The prospectus
This document describes the business, its finances, its risks and how the money will be used. It is the best source for facts, so read the risk factors section.
What to expect on day one
New listings can swing sharply in the first days. Prices are driven by excitement and limited information. Many individual investors cannot buy at the offer price and can only buy after trading begins, often at a higher price.
Be patient
Many investors wait for a few quarters of reports before deciding. There is no prize for being first, and waiting gives you more facts.
What an IPO is
An initial public offering, or IPO, is when a private company sells shares to the public for the first time. It raises money and lets early owners and investors sell some shares. After the IPO, the stock trades on an exchange.
How it works
A company hires underwriters, usually banks, files a registration with regulators and publishes a prospectus describing the business, financials and risks. It sets a price range, and the shares are sold to large investors first.
Risks for individual investors
IPO shares can be hard to get at the offer price and can be volatile on the first day. Companies are often unprofitable. Early insiders may sell after a lockup period ends.
What to do
Read the prospectus, especially the risk factors. Do not chase first-day pops. Size small. Use the filings guide.
Frequently asked questions
Do IPOs always rise?
No. Many trade below their first-day price within a year.
Further reading: Investor.gov from the U.S. SEC and the Canadian Securities Administrators investor education site offer free, independent guides for new investors.
Reading the prospectus without getting lost
A prospectus can run hundreds of pages. You do not need to read every word. Start with the summary near the front, which gives a short picture of the business. Then go to the risk factors. Companies must list what could go wrong, and this section is often blunt. Next, find the use of proceeds section. It says how the company plans to spend the money it raises. Finally, look at the financial statements for revenue, losses, and cash.
Ask three questions as you read. How does the company make money? Is it growing, and at what cost? What happens if it cannot raise more cash? If the answers are vague, that tells you something.
A worked example with round numbers
Imagine a company prices its IPO at $20 per share. Large investors get shares at that price. The stock opens for trading at $32 and jumps 60% on the first morning. Someone who buys at the open pays $32. By the end of the week, the price is $26. That buyer is already down about 19% from the open, even though the stock is still above the IPO price.
Now imagine the stock opens at $20 and slips to $17. The same company, a different day. The lesson is that first day prices reflect excitement and thin information. They are not a verdict on the business.
Terms you will see
A few words come up often. The lockup period is a set time, often several months, when insiders and early owners agree not to sell. When it ends, more shares can reach the market, and prices sometimes feel the pressure. The quiet period limits what a company can say publicly around the offering. The float is the number of shares actually available to trade, which can be small at first. You can find plain definitions of all of these in our glossary.
Common mistakes
Many people buy a new listing because friends or headlines are talking about it. Others place a market order on opening day, which can fill at a price far above what they expected. A limit order sets the most you will pay and protects you from that. A third mistake is putting too much of a portfolio into one newly listed company. Early reports from public companies are often the first real look at their finances, so surprises are common.
What to do next
Pick a company that listed in the last few years. Find its prospectus on sec.gov by searching its name in the EDGAR database. Read the risk factors and write three that stand out. Then compare its price today with its first day close. This is practice, not a recommendation. If you want to see what a value estimate might look like, read how to value a stock, and use the P/E ratio calculator once the company reports positive earnings. Patience costs nothing, and every quarter of reports adds to your picture.
Questions people ask about IPOs
Can anyone buy shares in an IPO?
In practice, most shares go first to large institutions. Some brokers offer limited access to individual investors, often with conditions. Most people buy once the stock starts trading on an exchange, usually at a price set by the market. Go slowly.
Why do some IPO stocks fall after they list?
Early prices can rise on excitement and then settle as more information arrives. Some IPOs also lose value because they were priced high or the business does not meet hopes. A strong first day does not predict later results. Go slowly.
Where can I read about the company before an IPO?
The prospectus, filed with the regulator, is the main source. In the US it is on the SEC’s EDGAR database. Read the business description, risk factors and financial statements, and check how the company plans to use the money raised.
Quick recap
An IPO is when a private company first sells shares to the public. Information is limited and prices can swing, so read the prospectus and its risk factors. Be patient, and avoid chasing early price jumps. Check official sources if unsure.
Education only, not investment advice.

